Application Function Node, Access and Mobility Management Function Node, System and Methods in a Communications Network

Abstract

A method performed by an Application Function, AF, node (131), for handling a data session for a User Equipment, UE, (120) in a communication network. The AF node obtains information about usage of a first frequency for the UE from an Access and Mobility management Function, AMF, node (132). The AF node then applies a first congestion mechanism based on the obtained information about usage of the first frequency. The AF node further obtains information about usage of a second frequency for the UE from the AMF node. The AF node then applies a second congestion mechanism in response to the obtained information about usage of the second frequency.

1 - 22 . (canceled) 
     
     
         23 . A method performed by an Application Function (AF) node, for handling a data session for a User Equipment (UE) in a communication network, the method comprising:
 obtaining information about usage of a first frequency for the UE from an Access and Mobility management Function (AMF) node;   applying a first congestion mechanism based on the obtained information about usage of the first frequency;   obtaining information about usage of a second frequency for the UE from the AMF node; and   applying a second congestion mechanism in response to the obtained information about usage of the second frequency.   
     
     
         24 . The method according to  claim 23 , wherein the AF node and the AMF node communicate via a Network Exposure Function (NEF) node. 
     
     
         25 . The method according to  claim 24 , wherein obtaining information about usage of the first frequency comprises:
 transmitting, towards the NEF node, a subscription request to a UE frequency event, wherein the subscription request comprises a UE identifier and an event identifier; and   receiving, from the NEF node, information about usage of the first frequency for the UE.   
     
     
         26 . The method according to  claim 24 , wherein obtaining information about usage of the second frequency for the UE comprises receiving, from the NEF node, information about usage of the second frequency for the UE. 
     
     
         27 . A method performed by an Access and Mobility management Function (AMF) node, for handling a data session for a User Equipment (UE) in a communication network, the method comprising:
 providing information about usage of a first frequency for the UE to an Application Function (AF) node;   detecting that usage of the frequency of the UE changes; and   providing information about usage of a second frequency for the UE to the AF node.   
     
     
         28 . The method according to  claim 27 , wherein the AF node and the AMF node communicate via a Network Exposure Function (NEF) node. 
     
     
         29 . The method according to  claim 28 , further comprising:
 receiving from the NEF node, a subscription request to a UE frequency event, wherein the subscription request comprises a UE identifier and an event identifier.   
     
     
         30 . The method according to  claim 28 , wherein the providing information about usage of the first frequency comprises transmitting, towards the NEF node, information about usage of a first frequency for the UE. 
     
     
         31 . The method according to  claim 28 , wherein the providing information about usage of the second frequency comprises transmitting, towards the NEF node, information about usage of the second frequency for the UE. 
     
     
         32 . An Application Function (AF) node, for handling a data session for a User Equipment (UE) in a communication network, wherein the AF node is configured to:
 obtain information about usage of a first frequency for the UE from an Access and Mobility management Function (AMF) node;   apply a first congestion mechanism based on the obtained information about usage of the first frequency for the UE;   obtain information about usage of a second frequency for the UE from the AMF node; and   apply a second congestion mechanism in response to the obtained information about usage of the second frequency of the UE.   
     
     
         33 . The AF node according to  claim 32 , wherein the AF node and the AMF node communicate via a Network Exposure Function (NEF) node. 
     
     
         34 . The AF node according to  claim 33 , wherein the obtaining information about usage of the first frequency is adapted to comprise:
 to transmit, towards the NEF node, a subscription request to a UE frequency event, wherein the subscription request comprises a UE identifier and an event identifier; and   to receive, from the NEF node, information about usage of the first frequency for the UE.   
     
     
         35 . The AF node according to  claim 33 , wherein obtaining information about usage of the second frequency for the UE is adapted to comprise to receive, from the NEF node, information about usage of the second frequency for the UE. 
     
     
         36 . An Access and Mobility management Function (AMF) node, for handling a data session for a User Equipment (UE) in a communication network, wherein the AMF node is configured to:
 provide information about usage of a first frequency for the UE to an Application Function (AF) node;   detect that usage of the frequency of the UE changes;   provide information about usage of a second frequency for the UE to the AF node.   
     
     
         37 . The AMF node according to  claim 36 , wherein the AF node and the AMF node communicate via a Network Exposure Function (NEF) node. 
     
     
         38 . The AMF node according to  claim 37 , wherein the AMF node is further configured to:
 receive from the NEF node, a subscription request to a UE frequency event, wherein the subscription request comprises a UE identifier and an event identifier.   
     
     
         39 . The AMF node according to  claim 37 , wherein the providing information about usage of the first frequency is adapted to comprise to transmit, towards the NEF node, information about usage of a first frequency. 
     
     
         40 . The AMF node according to  claim 37 , wherein the providing information about usage of the second frequency is adapted to comprise to transmit, towards the NEF node, information about usage of the second frequency.